Carbureter.



G. W. ROMANS.

GARBURETER.

APPLICATION FILED J'AN.19, 1911.

Patented Sept. 10,1912.

Inventor.

' T0 Romano;

7 A9 z/ is I wdznesses.

' valves for introducing UNITED STATES PATENT OFFICE.

GEORGE W. B OMANS, DE LOS ANGELES, CALIFORNIA.

CARBURETER.

in carbnreters for gas engines and particu larly for engines suitable for use upon automobiles or similar motor vehicles.

It is-an' objectof the invention to pro vide a carbureter having suitable controlling means for feeding of gasolene, with a valve mechanism capa controlling the inlet and supply of air and gasolene in proportion to the demands made thereupon by the engine.

It is alsoan object of the invention to provide a carbureter with a pair of inlet aso'leneand asingle valve for controllin the drawing of gasolene and air from t e valve.. ol1a'mbers into the engine to correspond w'i-th low or high speeds, the said single valvebeing also ca pable of cutting off the Quantity of the carbureted air required for high speedwhen desired and admitting onlythat required'for the low' speed.

It is also an object of the invention to provide a carbureterwith a gasolene inletre ulated by a float valve, a double carbureting chamber connected therewith and a valve mechanism capable of controlling the shutting'ofi by the engine of carburetedair from either one or both of said chambers as required.

In the accompanying drawing forming a part of this specification, Figure l is a perspective view of acarbureter constructed in accordance ,with the present invention. Fig. 2 is a vertical central. sectional view taken through said carbureter upon the line of the needle valves mounted therein. Fig. 3' is a detail perspective view of the throttle valve controlling the amount of carbureted air drawn from the carbureter. Fig. 4' is a horizontal sectional view taken *throughthe carbureter just above the float mounted therein.

The inventiont'will now be more particularly described with reference to the said drawin in which- 1 in icates a floatchamber casin 2 an air inlet valve casing and 3 a thrott e valve Specification of Letters Patent.

Application filed January 19, 1911.

Patented Sept. 10,1912; Serial No. 663,459.

casing. On one-side of the casing 1 is an.

reach for operation in priming the carburetor;

The valve 6 is provided with a slot 9 therein, which receives the outer end of a float lever 10-, the end of said lever playing loosely and freely inthe said slot. Thain ner endof the lever 10 projects into the easing 1 through a passageway 11 and'ha's securedto it within said chamber a float 12 of any usual or desired form. The" said float 12-wil-1- maintain the gasolene in the chamber only at the pro'er height, since when the gasolene fills t e chamber to a certain degree the valve will be caused to seat itself and cut oil the supply of gasol'ene untiht-he level of the gasolene in the said chamber 1 is lowered again.

Projecting into the float chamber-'1, from one side thereof are air inlet assages 18 and 14, which communicate with vertical passages 15 and 16 which extend approximately at right angles to the said passages 13 and 14 and upwardly through the top of the casing 1 as clearly illustrated in'Fig. 2. The said passages 18,14, 15 and 16 are usually cast integrally with the casing 1 in torming'the same.

Atthe inner ends of the passages 13an'd 14 are arranged inlet needle valves as at 17 and'lS, the said needle valves entering the passagesl-S and 14: through the bottom thereof. The needle valve casings communicate with the interior of the float chamher while the needles pass outwardly through the bottom of the casing and are provided with screw bushings l9 and 20 within which'the needle stems 21 and 22 are" mounted. The said stems have a threaded engagement with the bushings 19 and 20 and by turning the outer ends'of said stems the amount o'f-gasol'ene that will be cited through the needle valves can be controlled'from the exterior of the carbureter.

One of the passages 13 connects with a. valve controlled air inlet as at 23"which opening 23.

- upper end of the stem 26, which passes outside the casing 2. A lock nut 23 upon the outside of the casing 2 makes it possible to secure the said stem 26 in its adjusted positions.

In running the automobile or other engine to which the carbureter is connected, at a low rate of speed, ample air is provided for the carbureter through the entrance 23 and past a valve "When, however, a large quantity of gasolene is required for the engine, air is also drawn through the passage 14 under the control of the throttle valve which will be hereinafter described. The passage 14 opens into the atmosphere at its outer end and is provided with a slide as 29 which is pivotally mounted on the casing 1 at 30. The said slide 29 is adjusted to admit ust the right quantity of air for providing'a proper carbureting thereof within the carbureter and after its adjustment may be clamped in position by means of the screw upon which it is pivotally mounted at 30.

The drawing of carbureted air through the carbureter is controlled by means of a throttle valve 31 which is movably mounted within the casing 3. The said valve 31 is preferably formed. of a cylindrical shell usually closed at one end and open at the other, though it may be closed or opened at either end as desired, without affecting the action of the valve. The closed end, however, afl'ords a means for supporting an operating stud or hub 32, which projects outside the casing 3 and receives an operating handle as 33 of any desired shape. The cylindrical walls of the valve 31 are provided with inlet controlling ports 34 and 35, the port 34 being adapted to coincide with the end of the inlet passage 15, while the port 35 is adapted to be brought into coincidencewith the inlet passage 16. The port 34 is preferably made considerably longer than the port 35 so that carbureted air may be introduced from the passage 15 to the engine and operate the same upon comparatively low suctions, before any of the mixture is admitted from the passage 16 through the port 35. After the carbureted air passes through the valve 31 it escapes to the engine through the discharge opening 36 of the casing 3. Opposite to the ports 34 and 35 a valve 31 is provided with an elongated port 37 which has a reduced portion 38 formed therein and enlarged portions 39 and 40 which are successively brought opposite the discharge outlet 36, for permitting -the esgape of the quantities of the air and gasolene in the proportion in which they are received by the valve through the ports 34 and 35. The movement of the valve in one direction is limited by adjustable stop 41 secured upon the outside of the casing 3 and extending into the path of the lever 33 by which the valve is operated. The stop 41 is usually set so as to leave a small portion of the port 34 open, which will thus'admit enough gasolene when the carbureter is primed for starting the action of the engine. As the engine gains headway the valve 31 is turned more and moreso that the port 34 admits more and more carbureted air and when a high speed is to be attained the valve is still further turned so that theport 35 begins to admit the carbureted air from the passage 16. When the valve is fully opened, the engine will be able to draw carbureted air through the carbureter, to the full capacity of the passageways 15 and 16, through both the ports 34 and 35 and through the largest portion 40 of the port 37. through any usual or ordinary drain cook 42 as illustrated in Fig. l.

The mechanism above described is found very efiective for introducing the desired quantities of carbureted air with a ,proper mixing of air with the gasolene. The throttle 31 can be connected by its handle 33 with any suitable operating means extending to any portion of the automobile or other device carrying the carbureter.

l/Vhat I claim is 1. A carbureter,,compr sing a casing having a float chamber therein, the said casing having a plurality of parallel and adjacent air inlet passages, one of which is open at its? outer end directly'to the atmosphere, a valve chamber adjoining said open end, a spring pressed inlet valve in said valve chamber controlling the other air inlet passage, fuel supply nozzles, one of which enters each of said air inlet passages, means for directing the mixing materials to the throttle mechanism of the carbureter, a throttle mechanism mounted above the mixing passages, a throttle valve mounted therein and having a controlling port for each inlet, one being longer than the other to begin the introduction of materials before the other.

' 2. A carbureter comprising a casing having a float chamber therein for controlling the admission of fuel, the said casing being formed with a plurality of L shaped passageways, the lower portions of which communlcate with the atmosphere while the The float chamber may be drained.

upper portions extend to a throttle valve, fuel inlet nozzles extending into the said passageways and a cylindrical throttle valve having a long port communicating with one of said L shaped passageways and an -elongated portion communicating with-the other,

the said valve also having an opposing port in its wall of increasing size from one end thereof toward the other whereby the admis- 10 sion of mixing air and fuel may be controlled from both passages by the movement of said throttle valve.

In Witness that I claim the foregoing I have hereunto subscribed my name this 13th day of January, 1911.

GEORGE \V. ROMANS.

'Witnesses:

, EDMUND A. STRAUSE, CASSELL SEVERANCE. 

